/*
 * Copyright 2008-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.hasor.plugins.udfs.collection;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
/**
 * 集合函数基类
 * @author 赵永春(zyc@hasor.net)
 * @version : 2017-03-23
 */
public class AbstractCollectionUDF {
    public Collection<Object> toCollection(Object curData) {
        Collection<Object> listData = null;
        if (curData == null) {
            listData = new ArrayList<Object>();
        } else {
            if (!(curData instanceof Collection)) {
                if (curData.getClass().isArray()) {
                    listData = new ArrayList<Object>();
                    for (Object obj : (Object[]) curData) {
                        listData.add(obj);
                    }
                } else {
                    listData = Arrays.asList(curData);
                }
            } else {
                listData = (Collection<Object>) curData;
            }
        }
        //
        return listData;
    }
}